The average room-temperature properties for the O/90” and +45” fiber orientations are tabulated in
Table 3.1, with coefficients of variation, in percent, given in parentheses. The tensile properties came from
dogboned specimens, as described in Ref. 1. Averaging extensometers were employed. In the O/90” case,
many tensile specimens intended for other purposes were subjected to virgin stiffness (modulus) checks;
those data are included in the Table 3.1 average. Poisson’s ratio values came from special tests on
specimens with 3.2~nungage-length two-gage rosettes on both faces. The compression specimens are also
described in Ref. 1, as are the Iosipescu shear specimens that were used. Strain gages were used for strain
measurement in both of the latter two types of tests.